Columbian drug-lord Pablo Escobar kept four Hippos in his estate before his death in 1993. Deemed too much hassle to move by authorities, his Hippos were left there and have since bred and escaped becoming an invasive species of Columbia.

Tadpoles look more like fish than frogs, they have long finned tails and breathe through gills.

The largest bill U.S. bill made is for $100,000.

AMAZING FACTS